EP4108927A1 - Tête de coupe d'une pompe - Google Patents

Tête de coupe d'une pompe Download PDF

Info

Publication number
EP4108927A1
EP4108927A1 EP22175458.3A EP22175458A EP4108927A1 EP 4108927 A1 EP4108927 A1 EP 4108927A1 EP 22175458 A EP22175458 A EP 22175458A EP 4108927 A1 EP4108927 A1 EP 4108927A1
Authority
EP
European Patent Office
Prior art keywords
cutting
cutting head
head
impeller
pump
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22175458.3A
Other languages
German (de)
English (en)
Inventor
Johannes REUSCHEL
Benjamin Wegner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wilo SE
Original Assignee
Wilo SE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wilo SE filed Critical Wilo SE
Publication of EP4108927A1 publication Critical patent/EP4108927A1/fr
Pending legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • F04D7/045—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous with means for comminuting, mixing stirring or otherwise treating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0088—Testing machines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2288—Rotors specially for centrifugal pumps with special measures for comminuting, mixing or separating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F04D29/242—Geometry, shape
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/426—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for liquid pumps

Definitions

  • the invention relates to a cutting head of a pump for liquids laden with solids, for interaction with a cutting ring, with a cutting head base body assigned to an impeller of the pump, on the peripheral surface of which a plurality of cutting segments are provided, each of which has axially running cutting head cutting edges for comminuting the solids, which extend radially away from the cutter head body.
  • Admixtures of solids in liquids such as waste water can clog pumps or pipes.
  • so-called cutters are used, which are located in front of a suction area of the pump, in order to comminute the solids contained in the liquid.
  • Cutting units known from the prior art often have a fixed part, called the cutting surface or cutting element, and a rotating part, called the cutting head.
  • the cutting surfaces also known as the cutting sieve, have openings through which the liquid flows to an impeller of the pump. If the cutting surface is flat or conical, it is referred to as a cutting insert.
  • a cylindrical shape of the cutting surface is called a cutting ring.
  • a cutting unit upstream of the pump has an effect due to the influence on the inflow into the pump, it usually has a negative effect on the efficiency and the characteristic curve of the pump.
  • a cutting head of a pump for liquid laden with solids for interaction with a cutting ring with a cutting head base body assigned to an impeller of the pump, on the peripheral surface of which a plurality of cutting segments are provided, each having axially running cutting head cutting edges for comminuting the solids, which each extend radially away from the cutter head body and each from a liquid inlet side of the cutter head opposite the impeller essentially axially in the direction of the impeller, wherein at least two of the cutter head cutting edges have axial extensions of different lengths.
  • An essential point of the proposed solution lies in the fact that the different lengths of cutting head cutting edges result in a higher and thus better pump characteristic. While the longer cutting head cutting edge can interact with impeller blades, the shorter cutting head cutting edge acts additionally on the solids, resulting in a better cutting result and less clogging of the pump. An even better cutting result can be achieved if, for example, one third of the cutting head cutting edges are made longer to interact with the blades of the impeller and two thirds of the cutting head cutting edges are longer are made shorter. In order to form rotational symmetry, at least two cutting head cutting edges are preferably made shorter and a multiple of them longer.
  • a pump is generally referred to as a fluid machine that uses a rotary movement and dynamic forces to convey liquids as the medium.
  • the pump is preferably designed as a centrifugal pump.
  • a centrifugal pump in addition to a tangential acceleration of the liquid, the medium, centrifugal force occurring in radial flow is used for delivery, so that such pumps are also referred to as centrifugal pumps.
  • the pump can preferably be used for a hydraulic system in a building, for example as a waste water pump.
  • a housing of a motor of the pump can be arranged above a pump housing, in which the impeller driven by the motor via the motor shaft is provided for conveying the fluid, the housing of the motor being connected to the pump housing in a stationary manner and/or in one piece can be designed.
  • the motor shaft preferably protrudes from the housing of the motor into the pump housing on a drive side and/or the impeller is connected in a stationary manner to the motor shaft on the drive side.
  • the liquid preferably comprises water or another liquid medium such as waste water.
  • the fluid can include solids such as impurities of any kind, in particular faeces, sediments, dirt, sand, or also smaller pieces of wood, undergrowth, textiles or rags or the like.
  • the housing of the motor and/or the pump housing is preferably made of metal, in particular cast iron or stainless steel, and/or plastic.
  • the cutting ring is preferably designed with a disc-like cutting head body with an opening through which the cutting head is passed.
  • the main body of the cutting head can preferably be connected to the impeller of the pump, for example screwed.
  • the cutting head can be designed in one piece with the impeller, for example made of a metal or a plastic.
  • the cutting segments preferably extend radially away from the cutting head body and/or are regular Spaced and / or designed in one piece with the cutting head body.
  • the axially extending cutting head cutting edges are preferably provided radially on the outside of the cutting segments and preferably interact with cutting teeth of the cutting ring for comminuting the solid.
  • a rotational movement of the motor shaft can, for example, cause a textile caught by the cutting head cutting edges of the cutting body to come into engagement with the cutting teeth as a solid, so that the textile is shredded and as a result cannot clog the pump.
  • the cutting segments extend from the in particular cylindrical peripheral surface, preferably in a triangular manner in an axial plan view, towards the radial edge of the cutting head.
  • the axial extent of different lengths is preferably ⁇ 30%, 40%, 50%, 60% or 70%.
  • Substantially axially means in particular that, for example, a draft bevel can be included and/or the cutting head cutting edges can extend pivoted by 3%, 5% or 10% from the axial line.
  • the cutting head cutting edge can be designed in the form of a serrated edge. A shorter cutter head cutting edge is preferably provided between two longer cutter head cutting edges.
  • a first part of the cutting head cutting edges extends from the liquid entry side essentially over the entire axial extent of the cutting head and a second part of the cutting head cutting edges extends from the liquid entry side only over part of the entire axial extent of the cutting head.
  • the second part can, for example, only extend halfway through the first part.
  • the second part extends over a part such that the second part of the cutter head cutting edges cannot interact with the blades of the impeller.
  • the other part of the second part of the axial extent is designed without cutting head cutting edges.
  • the cutting head preferably has a smaller radial outer diameter than in the area in which cutting head cutting edges are provided.
  • the cutting segment tapers in the other part of the second part of the axial extent towards a side of the cutting head facing the impeller, in particular in the form of a drop.
  • the cutting segment tapers particularly in its radial extent from the cutting edge of the cutting head towards the peripheral surface of the main body of the cutting head.
  • the cutting segment preferably transitions smoothly, in particular linearly, into the main body of the cutting head, as a result of which flow optimization is achieved.
  • the cutting head has, on its side axially facing the impeller, a circumferential, cylindrical collar which ends flush with the cutting head cutting edges with regard to its radial outer diameter.
  • the collar preferably falls away in the manner of a segment of a circle or exponentially from the side facing the impeller towards the main body of the cutting head.
  • the collar which is designed in particular in the manner of a collar, tapers in diameter away from its side facing the impeller and merges in particular smoothly into the main body of the cutting head.
  • the collar preferably has the same radial diameter as the cutting head cutting edges or cutting segments and/or is made in one piece with the cutting head cutting edges or cutting segments that extend over the entire axial extent and/or are longer and/or merges smoothly into them.
  • the basic body of the cutting head is designed like a cylinder, the cutting segments extend radially away from the cylindrical peripheral surface and the cutting edges of the cutting head protrude up to the outer diameter of the cutting head, in particular the collar. If the first part of the cutting head cutting edges from the liquid entry side essentially over the extends the entire axial extent of the cutting head, this preferably means that the cutting head cutting edges extend up to the federal government.
  • the cutting head is preferably connected to the impeller in a non-positive and/or positive manner.
  • the cutting segments in particular in a radial plan view, extend non-linearly in the direction of rotation of the cutting head, in particular in a concave and/or circular segment-like manner, radially away from the cutting head main body to the respective cutting head cutting edge and/or facing away in the direction of rotation of the cutting head linearly radially from the main cutting head body away to the cutting head cutting edge. Due to the non-linear, in particular concave and/or circular segment-like design in the direction of rotation of the cutting head, flow optimization and thus an improvement in the efficiency of the pump can be achieved.
  • the cutting segments and/or the cutting head cutting edges are beveled on the liquid inlet side of the cutting head opposite the impeller, in particular circumferentially around the cutting head.
  • a further flow optimization can be achieved by the bevel, for example at an angle of 15°.
  • the object is further achieved by a pump with a cutting head as described above and with a cutting ring provided stationarily on the pump with a plurality of cutting teeth which cooperate with the cutting head cutting edges for comminuting the captured solid.
  • Such a pump enables a better inflow in the inlet area of the impeller, which results in a higher pump characteristic curve, since interference with the inflow between the blades or the blade channels formed by them is reduced compared to designs known from the prior art. Due to the cutting head cutting edges of different lengths described above, solids with larger diameters are held back better until they are sufficiently comminuted by the cutting ring on the outside, so that a better cutting result and a lower risk of blockages are achieved.
  • the pump designed as a submersible sewage motor pump, has a cutting mechanism upstream of an impeller 3, comprising a cutting head 1 and a cutting ring 2, which in figs 2 to 4 are shown.
  • Cutting head 1, cutting ring 2 and impeller 3 of the pump do not necessarily have to be designed as described below.
  • the pump can have, for example, the cutting head 1 described below, but the cutting ring 2 and impeller 3 can be designed differently than described below.
  • the cutting head 1 may not be designed as described below, which is, however, entirely possible. The same applies to the cutting ring 2 and the impeller 3.
  • the partial sectional view of 1 shows part of a pump housing 4 of the pump, above which a housing (not shown) for a motor of the pump is provided during regular operation of the pump.
  • the motor drives the impeller 3 via a motor shaft (not shown), through which liquid loaded with solids can be sucked in from a suction side 5 formed below the pump housing 4 .
  • the terms axial and radial used below are each related to the axial extension of the motor shaft.
  • the cutting head 1 is stationary, in particular non-positively and/or positively connected to the impeller 3 by means of a cutting head screw 6 and rotates accordingly with the impeller 3 during operation of the pump.
  • the cylindrical cutting ring 2 enclosing the cutting head 1 is connected in a stationary manner to the pump housing 4 by means of a plurality of cutting ring screws 7 .
  • a radial seal is provided between the cutting ring 2 and the impeller 3 .
  • the cutting head 1 protrudes into the suction side 5 so that liquid drawn in from the suction side 5 first flows through a gap provided between the cutting head 1 and the cutting ring 2 in order to then be conveyed through the impeller 3 .
  • the rotary movement of the cutting head 1 relative to the cutting ring 2 causes solids contained in the liquid to be crushed before they reach the impeller 3 .
  • the cutting head 1 has a cylindrical, rotationally symmetrical cutting head base body 8 made of metal, through which a bore 9 for receiving the cutting head screw 6 for attachment to the impeller 3 extends axially.
  • Cutting segments 11 arranged at regular intervals are provided on the peripheral surface 10 of the basic cutter head body 8 and are designed in one piece with the basic cutter head body 8 .
  • the cutting segments 11 each extend radially away from the main body 8 of the cutting head.
  • all cutter head base bodies 8 extend axially from a liquid inlet side 12 of cutter head 1 opposite impeller 3 and facing suction side 5 in the direction of impeller 3 and thus form axially running cutter head cutting edges 13 .
  • two cutting head cutting edges 13 each have a different angle than the other two cutting head cutting edges 13 long axial extent, since a first part of the cutter head cutting edges 13 extends from the liquid entry side 14 substantially or over the entire axial extent of the cutter head 1 and a second part of the cutter head cutting edges 13 extends from the liquid Trittsseite14 only extends over part of the entire axial extent of the cutting head 1.
  • the second part of the cutting segments 11 is shortened by about half compared to the first part, with the cutting segments 11 arranged opposite one another being identical in design.
  • the shortened part of the cutting segments 11 of the axial extent is designed without cutting edges 13 of the cutting head.
  • the shortened cutting segments 11 have a constant radial diameter up to about half of the axial extent of the cutting head 1 and then taper in diameter towards the side 14 facing the impeller 3 in the form of a drop.
  • the cutting head 1 On its side 14 axially facing the impeller 3 , the cutting head 1 has a circumferential cylindrical collar 15 which is designed in one piece with the cutting head body 8 and is flush with the cutting head cutting edges 13 with regard to its radial outer diameter.
  • the collar 15 tapers uniformly merging in its diameter from the side 14 in the direction of the liquid inlet side 12 into the cutting head body 8 .
  • the cutting segments 11 Facing the direction of rotation of the cutting head 1, the cutting segments 11 extend concavely radially away from the main body 8 of the cutting head towards the respective cutting head cutting edge 13. In contrast, facing away in the direction of rotation of the cutting head 1, the cutting segments 11 extend linearly radially away from the main body 8 of the cutting head towards the cutting head cutting edge 13. The same applies to the drop-shaped taper of the shortened cutting segments 11.
  • the cutting segments 11 and the cutting head cutting edges 13 are beveled on the liquid inlet side 12 of the cutting head 1 opposite the impeller 3, as shown in FIG 2 can be seen.
  • the cutting head 1 described above can interact with its cutting head cutting edges 13 with the stationary cutting ring 2 provided on the pump, having a plurality of cutting teeth 16 as described below.
  • FIG. 3 shows a cutting ring 2 of the pump in two perspective views (top) and in a sectional view (bottom) according to the preferred embodiment of the invention.
  • the cutting ring 2 has a ring-like cutting ring base body 18 forming an opening 17 .
  • in 1 When installed, the cutting head 1 shown is guided through the opening 17 .
  • the cutting ring 2 is fixed in place in an axial extension of the impeller 3 to the pump housing 4 of the pump by means of three cutting ring screws 7 grouped around the opening 17 .
  • a plurality of cutting teeth 16 with inner cutting edges 19 oriented axially in the direction of the impeller 3 and outer in the direction of the suction side 5 of the pump away from the impeller 3 are provided at regular intervals on the rotationally symmetrical cutting ring base body 18 around the opening 17, the cutting edges 19 when turning the cutting head 1 with the cutting head cutting edges 13 of the same.
  • Three cutting teeth 16 each extend axially away from the cutting ring base body 18 in the direction of the impeller 3 inward into the pump housing 4 and three cutting teeth 16 each extend outward in the direction of the suction side 5 out of the pump housing 4, as also in FIG 1 implied.
  • four, eight, twelve or more cutting teeth 16 can be provided, which are oriented alternately outwards and inwards.
  • An inner cutting edge 19 and an outer cutting edge 17 are formed between a tip of an outer cutting tooth 16 and a tip of an inner cutting tooth 16 in the axial extension around the opening 17 .
  • the outwardly extending cutting teeth 16 are shown in the sectional view at the bottom of FIG 3 shown below the disc-like cutting ring body 18, while the inwardly extending cutting teeth 16 are shown in the sectional view above the cutting ring body 18.
  • the perspective figure above right in 3 corresponds to this representation and shows the view of the cutting ring 2 seen from the suction side 5 , while the perspective illustration at the top left shows the view of the cutting ring 2 seen from the pump housing 4 .
  • a radially outwardly extending material recess 20 is introduced behind the cutting edge 19 in the direction of rotation of the impeller 4 .
  • Such a material recess 20 is also made in the inwardly extending cutting teeth 16 .
  • the outer diameter of the cutting teeth 16, which extend annularly around the opening 17 in a wave-like or sinusoidal manner around the opening in a plan view, is the same, while the inner diameter in the area of the material recess 20 is larger than in the area of the cutting teeth 16 without a material recess.
  • a radially outwardly extending pocket-like axial recess 22 is introduced into the cutting ring base body 18 in a valley 21 between at least two outwardly extending cutting teeth 16 .
  • pocket-like axial indentations 22 are introduced both in the valleys 21 between the cutting teeth 16 extending outwards and inwards.
  • the indentations 22 extend radially outwards from the bottom of the valley, deepening so that the cutting ring base body 18 is flattened radially outwards in the valley 21 .
  • the material cutouts 20 and valleys 21 are provided on and between all of the cutting teeth 16 and can be produced by milling or by a corresponding casting of a metal cutting ring 2 .
  • the outer cutting edge 19 of a valley 21 between two outwardly extending cutting teeth 16 and the inner cutting edge 19 of a valley 21 between two inwardly extending cutting teeth 16 overlap in the axial direction.
  • a cutting angle of the cutting edge 19 flattens out from the cutting ring base body 18 outwards towards a tip of the cutting tooth 16 .
  • a cutting angle of the outer cutting teeth 16 or the outer cutting edges 19 facing the cutting head cutting edges 13 is 55°, the cutting angle of the inner cutting teeth 16 being 52.5° in comparison. In the direction of rotation of the impeller 3, the cutting angle is flatter and is 20° on the outside and 10° on the inside.
  • Each cutting tooth 16 projects outwardly from the cutter ring body 18 at least 17 mm, with the inner cutting teeth 16 extending further axially away from the cutter ring body 16 than do the outer cutting teeth 16 .
  • the cutting teeth 16 are also radially 'sharpened', namely flattened at 37° on the outside and 33° on the inside in relation to the disk-like cutting ring base body 16 towards the opening 17 .
  • other cutting angles and dimensions are conceivable.
  • FIG. 4 shows a closed two-channel impeller 3 and the cutting head 1 of the pump in a perspective half-open view on the left and in a half-open top view on the right according to the preferred embodiment of the invention.
  • the cutting head 1 is still with the in 4 Impeller 3, not shown, stationary in an axial extension of the same for cooperation with the also in 4 Not shown cutting ring 2 connected.
  • the cutter head 1 is designed with a cutter head base body 8 with a plurality of cutting segments 11, each with cutter head cutting edges 13 running in particular axially, for comminuting the solid. cutter head cutting edges 13 extending radially away from cutter head body 8 .
  • the disk-like impeller 3 has, in the usual manner, two snail-like blades 23, each of which extends from a leading edge 24 facing the cutting head 1 at a central impeller opening 25 to the outer radial edge of the impeller, as shown in FIG 4 can be seen in particular on the right.
  • the blades 23 are axially bordered on the one hand by a radially extending support disk 26 on the motor side with a hub (not shown) for receiving the motor shaft of the pump and on the other hand on the suction side by a radially extending cover disk 27, so that the axially extending blades 23 between the support disks arranged parallel to one another 26 and cover plate 27 are provided.
  • the impeller 3 On the radially outer edge, the impeller 3 is open radially between the support disk 26, the cover disk 27 and two adjacent blades 23 in the form of a rectangle in a lateral plan view.
  • the cutting head cutting edges 13 are arranged at a distance from the leading edges 24 . Furthermore, the leading edges 24 are spaced radially outwards from the inner edge of the impeller opening 25 . In addition, the cutting head cutting edges 13 are arranged radially in advance in the direction of rotation of the impeller 3 and in particular radially overlapping the leading edges 24, as indicated by the angle ⁇ in 4 indicated on the right. In other words, the leading edges 24 of the impeller 3 and the cutting head cutting edges 13 do not lie on a radial line.
  • the angle ⁇ is, for example, ⁇ 2.5°, 5° or 10° and in particular ⁇ 2.5°, 5°, 10°, 15°, 20°, 30° or 45°.
  • the cutting head cutting edges 13 and the leading edges 24 extend parallel to one another. Radially overlapping means in particular that the leading edges are at least partially arranged at the same axial height and/or at least partially in a common radial plane as the cutter head cutting edges.
  • the axial extension of the cutting head cutting edges is preferably greater than the axial extension of the leading edges.
  • the cutting head 1 passed through the impeller opening 25 has four cutting head cutting edges 13 .
  • the shortened cutting segments 11 are provided in front of the blades 23 on the suction side, so that the cutting head cutting edges 13 of the shortened cutting segments 11 are not transferred to the blades 23 .
  • the impeller 3 expediently has four blades 23 .
  • a cylindrical sealing gap (not shown) is provided between the suction side 5 of the impeller 3 and the pump housing 4 for the radial sealing of the impeller 3 .
  • a further seal is formed in that the cutting ring 2 at least partially encloses the impeller 2 to form a conical sealing gap.
  • Reference List cutting head 1 cutting ring 2 Wheel 3 pump housing 4 suction side 5 cutting head screw 6 cutting ring screw 7 cutting head body 8th drilling 9 peripheral surface 10 cutting segment 11 liquid inlet side 12 cutting head cutting edge 13 side 14 Federation 15 cutting tooth 16 opening 17 cutting ring body 18 cutting edge 19 material recess 20 valley 21 deepening 22 shovel 23 leading edge 24 impeller opening 25 carrier disc 26 cover disk 27

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP22175458.3A 2021-06-24 2022-05-25 Tête de coupe d'une pompe Pending EP4108927A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
LU102842A LU102842B1 (de) 2021-06-24 2021-06-24 Schneidkopf einer Pumpe

Publications (1)

Publication Number Publication Date
EP4108927A1 true EP4108927A1 (fr) 2022-12-28

Family

ID=77431355

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22175458.3A Pending EP4108927A1 (fr) 2021-06-24 2022-05-25 Tête de coupe d'une pompe

Country Status (3)

Country Link
EP (1) EP4108927A1 (fr)
CN (1) CN115523152A (fr)
LU (1) LU102842B1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0120178A1 (fr) * 1982-10-11 1984-10-03 Flygt AB Pompe centrifuge pour des eaux chargées
EP1344944A1 (fr) * 2002-03-14 2003-09-17 KSB Aktiengesellschaft Pompe centrifuge avec un dispositif de broyage
US7841550B1 (en) * 2007-11-20 2010-11-30 Vaughan Co., Inc. Cutter nut and cutter bar assembly
WO2012173488A1 (fr) * 2011-06-17 2012-12-20 Jets Invest As Pompe à anneau liquide de type à vis ayant un dispositif de macération intégré
CN211397921U (zh) * 2019-12-26 2020-09-01 新界泵业(浙江)有限公司 切割研磨泵

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0120178A1 (fr) * 1982-10-11 1984-10-03 Flygt AB Pompe centrifuge pour des eaux chargées
EP1344944A1 (fr) * 2002-03-14 2003-09-17 KSB Aktiengesellschaft Pompe centrifuge avec un dispositif de broyage
US7841550B1 (en) * 2007-11-20 2010-11-30 Vaughan Co., Inc. Cutter nut and cutter bar assembly
WO2012173488A1 (fr) * 2011-06-17 2012-12-20 Jets Invest As Pompe à anneau liquide de type à vis ayant un dispositif de macération intégré
CN211397921U (zh) * 2019-12-26 2020-09-01 新界泵业(浙江)有限公司 切割研磨泵

Also Published As

Publication number Publication date
CN115523152A (zh) 2022-12-27
LU102842B1 (de) 2022-12-29

Similar Documents

Publication Publication Date Title
DE2164885C2 (de) Mahl- bzw. Schleifpumpe
DE2903064A1 (de) Einrichtung zum kuehlen des motors einer kreiselpumpe zum foerdern von fluessigkeiten mit aufgeschwemmten feststoffen
DE112004001196T5 (de) Pumpenlaufrad und Zerkleinerungsplatte für eine Zentrifugalpumpe
EP2188532B1 (fr) Roue à aubes de pompe et pompe comprenant une telle roue à aubes de pompe
CH633617A5 (de) Kreiselpumpe mit einschaufel-laufrad zur foerderung von langfaserigen aufgeschwemmten feststoffen.
DE2313403A1 (de) Axial-stroemungsmaschine
DE19519799B4 (de) Kreiselpumpe
EP3179112B1 (fr) Couvercle de pompe avec trous formés comme filtres inertiels
DE2322772C3 (de) Abwasserpumpe
EP2226505B1 (fr) Roue vortex dotée de bords coupants
EP2348220B1 (fr) Pompe submersible
DE4438841C2 (de) Pumpe mit einer Schneideinrichtung
EP3670920B1 (fr) Dispositif d'aspiration pour une pompe immergée à eaux usées
EP2660473A1 (fr) Pompe à eaux usées
LU102842B1 (de) Schneidkopf einer Pumpe
LU102841B1 (de) Anordnung umfassend ein Laufrad und einen Schneidkopf für mit Feststoff belastete Flüssigkeit einer Pumpe
LU102840B1 (de) Schneidring für mit Feststoff belastete Flüssigkeit einer Pumpe
DE102015212653B4 (de) Haushaltsgerät
DE102011000732B3 (de) Drehkolbenpumpe
CH700016B1 (de) Gleitringdichtung.
DE2757746A1 (de) Vorrichtung zum aufbereiten einer suspension
EP1344944A1 (fr) Pompe centrifuge avec un dispositif de broyage
DE3715322C1 (en) Meat-mincing machine having a separating device for soft and hard parts of cut material
DE3317733A1 (de) Zerstueckelungsvorrichtung, insbesondere zur zerkleinerung des festphasengehaltes von fadenartige, faserige und/oder stueckige materialien und/oder schlamm enthaltenden fluessigkeiten sowie ihre verwendung
DE2229650C3 (de) ZerreiBwerk, insbesondere zum Zerkleinern von Fließmist

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KEIL, THOMAS

Inventor name: ZEISS, ANDREAS

Inventor name: WEGNER, BENJAMIN

Inventor name: REUSCHEL, JOHANNES

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230615

17P Request for examination filed

Effective date: 20230628

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR